Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
1984 Mazda B2000 Sundowner, AutomaticFACTORY OEM SERVICE PROCEDURE
Federal Models
- Remove water thermo switches from radiator and intake manifold. Switch in intake manifold (fast idle) has Brown/Red and Yellow/Blue wires attached, switch in radiator (throttle positioner) has Black/Blue and Black wires attached.
- Immerse base of switch in container of cold water. Connect ohm meter across switch terminals. Gradually heat water and observe temperature at which circuit opens. Standard temperature should be between 59-67°F (15-19°C) for radiator switch, 150-157°F (65-69°C) for intake manifold switch.
Factory Service Tools
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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